coupling constant restrain of D-Amino Acid for structural refine.

Dear Netters:
Does any one could point me some references about how to use the
measured 3J-na coupling constant of a D-form amino acid as an additional
restrain in nmr structural refinement.
Any suggest/comment will be great appreciated.
Thanks all
ccchuang
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Chyh-Chong Chuang
Institude of Biological Chemistry,
Academia Sinica,Taipei, Taiwan
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Phone: 886-2-7858981 ext 7091
Fax: 886-2-7883473
E-Mail: ccchuang at gate.sinica.edu.tw
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